Saw-swaging machine



(No Model.)

l SAW SWAGING MACHINE. Y No. 801,888.' Patented' my 8, 1884.

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UNrTEDf STATES PATENT Turion.

' DAVID DONALDSON, GF ROCK ISLAND, ILLINOIS.

SAWFSWAGIN G MACHINE.

SPE'I-ICATION forming part of Letters Patent No. 301,696, dated July 8, 1884, l

Applicationiilcd September 13, 1883. (No model.)

Beit known that l, yDavrn DoNaLDsoN, of Rock Island, in the State of- Illinois, have invented certain new and useful Improvements in Machines for Holding Saws while being Swaged; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being hadto the accompanying drawings, and to the letters of reference marked. thereon, which forni part of this specification, in which- Figure l is an elevation of one side of the improved saw-swage. Fig. 2 is a top view. Fig. 3 is avertical section on line m Fig. 1. Fig. i is a perspective view of the anvil-shaft and its slotted sector.

This invention relates to machines which saws during the operation ofswaging or spreading the points of the teeth; and it consists in certain novel devices L'for centering saws of different diameters, and also for holding the same during the operation of spreading the teeth by means of a hammer held in the hand of the attendant, as will be fully understood from the following description, when taken in connec- A designates the frame of the machine, on top of which is an arbor, B, which has its bearings on a slide, C, guided by ways a a. This slide is movable by means of a screwthreaded shaft, D, on one end of which is a hand-crank, D. On one end of the arbor the sawto be treated is suitably clamped, as shown in the drawings. f

H designates a bracket secured to one side of the frame near the front end of the same, and provided at its upper end with bearings for a pair of curved arms,F F', which are suitably pivoted to the upper side of the said bracket upon'a shaft, s. The said arms are connected at the upper ends by means of the anvil-shaft c', which is provided between the arms F F with a iiattened section, c, forming the anvil.` VOne end of the shaft cprojects beyond the inner' curved arm, F. Upon the outer end of the shaft c is keyed a sector, J, having a segmental slot, k, through which passes a vset-screw, e, working in the outer4 means of a setscrew, G, passing through the bracket H, and having an upward-extending frame, E, provided with a curved rest or bearing, b, adapted to support the inner curved arm, F, thus retaining the latter, and with it the anvil-shaft, securely in position, and affording a rm support for the same during operation.

The operation is as follows The saw is clamped on the arbor B, and by means of the screw D it is adjusted forward or backward according to its size until the point of a tooth will rest on the anvil c when it is in position shown in the Figs. l and 2. The slide S, carrying thc rest E, is also adjusted by means of 7o the screw G until it will support the free end of the curved arm F, thus retaining the latter and the anvil in position, as stated, during operation. By means of the slotted sector the anvil-shaft may be turned until its iiattened section forming the anvil shall be adjusted to the proper position. in which it is retained bythe set-screwe. The operator,- with a small hammer, may now spread or swagethe point of the tooth resting on the anvil. This being done, the curved arms are thrown outward or forward a short distance, thus bringing the anvil away from the saw, and enabling the latter to be turned forward the space of one tooth. The curved arms carrying the anvil are now moved back to the original position, thus causing the anvil to support the next tooth and enabling the operation to be repeated.

Having described my invention, what I claim as new, and desire to secure by Letters Fat-ent,

l. In a saw-swaging machine, the combination of aframe, a horizontally-adj estable shaft or arbor, a horizontally-adjustable rest, and an anvil pivotally secured to arms pivoted to a bracket, H, secured to one side of the frame, as set forth.

2. The combination of thepivoted anvilbearjustable anvil, and the adjustacle rest, sub- 1o ing arms, the anvil thereon, and the rest there stantially as and for the purposes described. for, substantially as described. In testimony that I claim the foregoing as 3. The combination of the adjustable anvil, my own I afx my signature in presence of 5 means for rigidly holding the same, the pivtwo Witnesses.

oted anvil-arm, and the adjustable rest7 sub- `DAVID DONALDSON.

stantially as described. l Witnesses: 4.' The combination of the adjustable saw- ADAIR PLEAsANTs, j holding arbor, the pivoted arm bearing an ad- M. EDWARD SWEENEY. 

